Mass delete Comcast marketing messages on DVR

Does anyone know a way to MASS DELETE the messgaes that come via the Comcast DVR? Seems these days they send many of them at once and they are all sales and marketing related. Deleting one at a time is a pain. I have turned off the alert light but mass deleting seems like it SHOULD be possible.

And if you read this Comcast, just so you know, this type of mass marketing isn't something that endears you to your customers.